Sound-reproducing machine



E. SCHWARTZ AND L. MANDEL.

SOUND REPRODUCING MACHINE. APPLICM'ION FILED APR. 10 19i6.

1 21,559; Patented Nov. 11,1919.

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E. SCHWARTZ AND L.MANDEL.

SIOUND REPRODUCING MACHINE- APPLICATION FILED APR-110.1916. 1,321,559.Patented Nov. 11, 1919.

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l ""IIIJIII I mm m mm lmlmmlllll III Illllllllllllllllllll E. SCHWARTZAND L. MAND E-L. SOUND HEPRODIUCING MACHINE. APPLICATION FILED APR. 10.me.

1 521,559. Patented Nov. 11, 1919.

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7 l 02155 zZa/zdei, mcz i UNITED STATES PATENT OFFICE.

EDWARD SCHWARTZ 'AND LOUIS MANDEL, OF CHICAGO, ILLINOIS, ASSIGNORS, BY

DIRECT AND MESNE ASSIGNMENTS, TO THE MANDEL CORPORATION, A CORPO- RATIONor DELAWARE,

SOUND-REPRODUCING MACHINE.

Specification of Letters Patent.

Patented Nov. 11, 1919.

Application filed April It), 1916. Serial No. 90,027. i

To all whom it may concern Be. it known thatwe, EnwAnn SCHWAR'IZ andLouis lvhnvnnn. citizens of the United States. residing at Chicago, inthe county of Cook and State. of Illinois, have invented certain new anduseful Improvements in 'Sound-Reproducing Machines. of which thefollowing is a specification. I

'l i'hisinvention relates to improvements in sound reproducing machinesand one of the objects of the same is to provide an impro (1 tone armfor supporting the repro- 'ducer or sound bOX, having means whereby the.sound'box may be adjusted with respect to the arm to position the stylusfor use with records of the type having what is known as lateral soundwave indications, and also to position the. stylus for use with recordshaving what is known as hill and dale sound indications, and securingmeans for retaining the sound box in its adjusted positions.

A further object is to provide an improved mounting forthe tone arm andimproved means operating to assist in holding the supporting arm torelieve the record from the pressure. of the stylus point, therebypreserving therecord from being cut. or worn out by the stylus.

A further object. is to provide an improved hollow sectional touearm.the sections of which gradually increase in size in cross section andthe wall of each section being (Ulliillllottsl)' curved in crosssection. with the result that quality andvolume of the re 'iroductioiiwill be obtained, while the sound waves will gradually cxpand and acontinuous metallic sound willbe obviated.

To the attainment of these ends and the accomplishment of other new anduseful objects as will appear. the invention consists in the features ofnovelty in substantially the construction. combination and arrangementof the several parts hereinafter more away showing the tone arm andthemanner for supporting the same.

Fig. 2 is a perspective view of the yielding supporting means for thetone arm shown in Fig. 2.

Fig. is an irregular sectional view as taken on line 33, Fig. 3.

Fig. 3 is a sectional view taken on line 3 Fig. 3.

Fig. 4. is a detail top plan view of the parts shown in Fig. 2 and withthe sound box arranged in a horizontal position with respect to therecord support.

Fig. 5 is an enlarged detail view partly in elevation and partly onsection of the sound box and showing the stylus socket in section.

1 Fig. (5 is an enlarged detail vertical sectional view of a portion ofthe tone arm,

showing one form of yielding support for the arm.

P Fig. is a sectional view as taken on line (-l, 1 1g. (3.

Fig. 8 is a sectional view taken on line 88, Fig. 6.

Fig. 9 is a view partly in elevation and partly in section of aportionof the. tone arm showing the manner of connecting the sound boxthereto.

Fig. 10 is a sectional view on line 10-10, Fig. 9.

Fig. ll is a modified form of fastening device for retaining the. soundbox in its adjusted position with respect to the tone arm.

Fig. 12 is a sectional view on line 12, 12, Fig. 11.

Fig. 1 5 is a view similar to Fig/11 of. a modified form of fasteningdevice.

Fig. 14 is a sectional view taken on line 14, 1 Fig-l3.

Referring more particularly to the drawings. the mmieral 2t) designatesthe cabinet and 21 the record support of a sound reproducing machine,and the numeral 22 designates the top of the support for the-tone arm.This top is provided with an opening 23 therein with which one end (ifthe sound amplifying born 24 registers. Secured to the'support 22 andadjacent the opening 23, is a bearing 25, which is provided with aflanged portion 26. that adapted to project into the opening 23 andserves as a means whereby the bearing 25 maybe properly positioned withrespect to the opening. The tone arm comprises a plurality ofsections26, 27, 28 and 29, each of'which sections is of a uniform diameterthroughout its length and circular in cross section so as to'formcontinuous unobstructed circular surfaces for each of the sectionsand the diameter of each succeeding section increases in size from thediameter of the next preceding section. Connected with the extremity ofthe section 29 is acollar 30 which is preferably. curved on its outersurface and this collar projects into the hearing- 25, the latter beingprovided with an open groove 31 adapted to receive pins or lugs .32 onthe collar 30, so as to hold the parts together, and these lugsand-groove permit the'tone arm to be adjusted laterally with respect tothe record support, while the groove and lugs are of such a size withrespect toeach other that the tone arm, may

.be moved in adirection toward and away from the record support. Inorder to permit the assembling or disassembling of t ese parts, one ofthe walls of the groove is provided with one 'or' more opleningt'33 toperv mit the lug to pass theret roug Arranged upon the bearing 31 arespaced stops 34, 35-which are adapted to be en gaged' by a; projection36 carried by the section 29', and these stops limit the lateraladjustment ormovement, of the tone arm. The stop 35 is provided withashoulder 37 which in turn has a stop 38 connected'therewith and thisshoulder 37 is adapted to be engaged by the projection 36 to hold thetone arm elevated forthe purpose of ad- -justing the stylus or forholding the stylus duced portion 39 is preferably provided elevated topermit a change of record. The section 26 of the tone arm is connectedwith the section 27 so as to rotate axially with relation thereto,preferably by means of a reduced portion 39 on the section 27, whichtelescopes into the section 26, and this rewith'a slot 40 into which apin or lug 41 projects so as to limit the extent of rotation of thesection 26 with respect to the arm. This lug 4:1 is preferably in theform of a screw havin threaded engagementwith a bearing 42 ornled out ofthe material of which. the section--26 is constructed.

The sound box 43 .is connected with the section 26 on the tone arm'andthis sound box is provided with a stylus holder 44, in

which the stylus 46 is adapted to be held.

In order to support the tone arm and to relieve the record of the weightof the tone arm and sound box, thereby preserving the :record andpreventing the stylus from cutthe roller 49'will have engagements withthe inner face of the projecting flange 26 on thebearing 31 to rollthereover when the tone arm is shifted laterally.

The free extremity of the section 26 of the tone arm is deflectedlaterally as at 50, and the sound box is rotatably connected with thisextremity 50. The connecting means preferably comprises a sleeve 51having a flange 52'and this flange rests upon a washer of insulation 53arranged ad acent the back of the sound box, the latter being providedwith spaced projecting lugs 54,

rovided with screw threads therein. The insulation 53' is provided witha series of openings which receive the'lugs 54 and by means ofwhich lugsthe insulation is held in position. A washer of insulating materlalsurrounds this sleeve 51 and rests surrounds and rests upon theinsulation and the insulation and washers are secured to the sound boxby means of fastening screws 57 passing through the washer andinsulation and engaging the threads in the respective lugs 54. Theopening in the washer 56 is of such a size that the inner -wall thereofis spaced some distance from the 'sleeve.51, so that when the sleeve isinserted or telescoped into the extremity 50 of the section 26 of thetone arm, the washer will be'spaced from the adjacent portion of thetone arm,thereby thoroughly, insulating the sound box from theftone arm.In order to limit the degree of rotation of the sound box with respectto th'esection 26, a lug 58,

preferably in'the form of a screw is provided which passes through aslot in the extremity 50 and is secured to-the sleeve 51. To retain thesound box in its adjusted position, spaced depressions 60 may beprovidedin the extremity 50 of the section 26' and a spring controlled lug 61 isprovided which passes through a suitable opening in the tone arin so asto be'seated in the recesses or depressions- 60 when either one of thelatter is moved adjacent the lug.-

With this construction it will be manifest i that the sound box will beso adjusted that it will b in a perpendicular position with respect tothe record support and the styluscan. be used with records 'havin' whatis lgpown as lateral-wave indication. The sound box, may alsofberotated-with respect to the arm so; as to "properly-position the styluswhen the sound box is in avertical position. the provision of theadjustable section 26 of the tone arm, it will be manifest that thsound'box may be positio'hed so that it will be substantially horizontalwith respect to the record support and this will permit records havingwhat is known as hill and dale sound indications to be played on thesame machine.

It will also be apparent that by the independent adjustment of the soundbox with respect to the section 26 of the tone arm, the stylus may bepositioned so that it will be in a direct line with the center of theton arm, so that the stylus, when the sound box is adjusted for the hilland dale records,- will not engage the sides of the sound waveindications.

In order to position the stylus with respect to the socket 44, for thedifferent positions of the sound box, the socket is provided with anopening 62, whichreceives the stylus 46 when the sound box is in avertical position. This socket is also provided with a threaded opening63 which holds theusual screw for securing'the stylus in position. Thisthreaded opening, how- 'ever, is adapted to receive the threadedextremity 64 of the-stylus 65 when the sound box is in a horizontal.position, and the. socket is further provided with another opening (36for use when the sound box is in a horizontal position, but this opening(36 is arranged in an inclined position with respect to the. opening-6?,to accommodate a type-of record of still another manufacture.

In Figs. 9 and 10 there is shown a modified form of securing means forholding the sound box in its adjusted position with respect to thesection and in this form the extremity 50 of the section 26 is providedwith a slot 67, the extremities of which are enlarged as at 68. A spring69 is secured to the inner face of the sleeve 51 and projects into theextremity 50. This spring supports a ball 69, which is adapted toentereither one or the other of the en largements 68 of the slot 67 whenthe sound box is rotated, thereby yieldingly holding the sound box inits adjustedposition.

In Figs. 11 and 12 another form is shown and comprises an elastic ring70 having a lug 71 adapted to enter a slot 72 in the extremity 50 of thesection 26, to be seated in one or the other of the spaced openings 73in the sleeve 51. the spring being provided with a second lug 74.entering the slot 72 to hold the parts assembled.

In Figs. 13 and 14 the spring 75 is.provided wit-h a lug 76 entering anopening in the extremity 50 and is also provided with another lug 77adapted to be seated in one or the other of the openings 78 in thesleeve 7 51 when the latter is rotated.

1 In Figs. 6, 7 and 9, there. is shown a modified form of the yieldingsupport for the tone arm and comprises a bracket 79 located within theextremityof'tlw tone arm and in which bracket a stem 80 is adapted tomove. This stem has connected with it an anti-friction roller 81 adaptedto engage and move upon a guide or support 82 arranged within thebearing 25, and an elastic member 83, such as a spring surrounds thestem so and operates thereon to projectthe anti-friction roller 81 sothat it will roll upon thesurfaee 5+. and will yield to permit theroller to pass on to and off of the surface 82 when the tone arm islaterally adjusted.

I What is claimed as new is:

1. In. a sound reproducing machine, a hollow tone arm and sound boxcommunicating therewith, means at one end of the arm for supporting thearm for lateral movement and also for movement toward and away from therecord support, a surface within the sound duet, yielding means disposedon the inside. of the arm and at the said end thereof and movable oversaid surface for relieving the pressure of the stylus upon the record.

2. In a sound reproducing machine, a hollow tone arm and sound boxcommunicating therewith, means at one end of the arm for supporting thearm for lateral movement and also for movement toward and away from therecord support. and spaced stops and a lug for limiting the lateralmovement of the arm. said spaced stops and lug being disposed one on thearm and the other on the support. one of said stops being provided witha shoulder. upon which the lug is adapted to rest to support the stylusout of operative relation with the record;

' 3. In a sound reproducing machine a hollow tone arm and ound boxcommunicating the pressure of the stylus, said yielding means projectinginto the said bearing and a contacting surface on the bearing with whichthe said means contacts and over which surface the said means moves.

4. In a sound reproducing machine a hollow tone arm and sound boxeou'ununicating therewith. means for supporting the arm by one end forlateral movement and also for movement toward and away from the recordsupport. yielding means disposed on the inside of the arm, and a surfacewithin the sound ductover which said yielding means moves for relievingthe record of the pressure of the stylus, the first said means embodyingcooperating means for securing the parts against separation.

warm and movable over 5. In a sound reproducing machine, a hollow tonearm and sound box communicating therewith; means at one end of the arm'for supporting the arm for lateral movement and also for movementtowardand away from the record support, the sald means emthe said flangefor I relieving the pressure of the stylus upon the record.

In testlmony whereof we have signed our '15 names to this specification,in the presence of two subscribing witnesses, on this 6th day of'AprilA. D. 1916.

-* EDWARD SCHWARTZ.

LOUIS MANDEL.

WVitnesses:

"M. B. SILVERMA'N, J. H. loc -run, J r.

